A subset of the Geronimo book series under the name Thea Stilton. The series follows the lives of the Thea Sisters, a group of female mouse characters attending Mouseford Academy, a prestigious school.

Each book features a separate plot. Some entries focus around activities related to the academy, while others have the Thea Sisters going on adventures and solving mysteries around the world.

Main Characters:

• thea_sisters
• colette_(thea sisters)
• nicky_(thea_sisters)
• pamela_(thea_sisters)
• paulina_(thea_sisters)
• violet_(thea_sisters)

Minor Characters:

• Squid Family:
• dina_squid
• mary_squid
• thea_stilton - Thea is the only member from the Stilton family to appear in this series.

Antagonists:

A group of female mouse characters referred to as the Ruby Crew serve as the primary antagonists in the series. Ruby Flashyfur is the red haired leader of the group. Alicia, Connie, and Zoe are her followers. Ruby is also known as Vanilla De Viennese in the graphics novels.

See also:

• geronimo_stilton_(series)
• thea_stilton - Character
• thea_stilton_(series) - Book series
• thea_sisters